Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 778 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a small bottle (c) a magnet (d) turmeric powder
3. 3.True or false: carry water upward is a job of the leaves. (a) True (b) False
4. 4.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
5. 5.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) digestion (c) transpiration (d) germination
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
9. 9.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
10. 10.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a mirror (d) a balloon
12. 12.True or false: a mirror is not needed for making butter. (a) True (b) False
13. 13.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) whoever is fastest (c) only an adult (d) any child
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) lemon juice (d) plain water
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) how clear the water is (c) the filter material (d) the same funnel
19. 19.🧺 Which of these is needed for making butter? (a) fresh cream (b) a balloon (c) a battery cell (d) yeast
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
22. 22.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
23. 23.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it sinks to the bottom (c) it turns to sand (d) it dissolves
24. 24.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they become magnets (c) they react (d) they float apart
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.True or false: hold up the leaves is a job of the stem. (a) True (b) False
27. 27.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) mix bathroom cleaners (d) sniff each bottle hard
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🫧 Which of these is an acid? (a) detergent water (b) curd (c) sugar water (d) salt water
30. 30.🧺 Which of these is not needed for making butter? (a) a magnet (b) a bowl (c) a jar with a tight lid (d) a timer
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🔮 Predict: the adult irons for only one second. What happens? (a) writing stays faint (b) writing turns green (c) the paper floats (d) it gets darker
33. 33.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) musical (c) chemical (d) magnetic
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
36. 36.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
37. 37.True or false: a magnet is something yeast does not need. (a) True (b) False
38. 38.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
39. 39.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
40. 40.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it

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